Hi and Welcome,

I am curious if your doc has given a reason why they think the two prior devices didn't work for you. Keep in mind I ask this as someone who does not have an SCS. It just made me wonder if your current paddle placement was not optimal or if something else could have happened with it....
Did your initial trial work?

If you have any unanswered questions that you need put to rest before surgery by all means consult your doctor ahead of time.

I hope you find relief soon and have a rapid recovery.
Sending hugs and healing love,